Development and indoor testing of multi-channel thermal packer for offshore thermal recovery wells
Most of the offshore thick oil thermal recovery wells are horizontal wells,with large reservoir depth and large heat loss along the wellbore,and the wellbore thermal insulation method of"insulated tubing+nitrogen injection in the annulus"is currently adopted,which is characterized by large nitrogen injection volume,high cost,and the risk of vaporization,etc.In this regard,a multi-channel thermal packer has been developed.For this reason,a multi-channel heat-sensitive packer was developed.Through the preferred expansion agent,the packer can rely on the expansion agent without Kawa thermal sealing,cooling rubber tube contraction uplift unsealing mining,high operational safety;the main body adopts the eccentric structure design,increase the annulus nitrogen injection/backwash wells,liquid control pipelines and fiber optic cables through the channel and supporting the single-flow valve,to meet the offshore thermal mining wellbore tubing has a nitrogen injection channel and monitoring of the special requirements.Indoor tests show that:the sealer seating temperature of 240℃,temperature resistance of 350℃,pressure resistance of 21MPa,single-flow valve opening pressure difference of less than 1.5MPa,seating and unsealing safe and reliable,good sealing performance,in the offshore thick oil thermal recovery has a good prospect of popularization and application.
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维普
